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. Author manuscript; available in PMC: 2018 Jan 1.
Published in final edited form as: Biol Psychiatry. 2016 Jan 18;81(1):67–77. doi: 10.1016/j.biopsych.2015.12.028

Figure 2. Structures of selective D1 antagonists and PET ligands.

Figure 2

The site of radiolabeling is shown by the asterisk. The most pharmacologically active isomer is shown, although these compounds are sometimes used as racemates.